Characterization of graphene-on-insulator films formed using plasma based surface chemistry

Raghavan, S.; Denig, Tobias; Nelson, Timothy C.; Chaudhari, Subodh; Stinespring, C. D.

doi:10.1016/j.carbon.2015.11.067

Cited by 12 publications

(8 citation statements)

References 54 publications

(70 reference statements)

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“…On the other hand, the deformation of Dirac cones for the AAB-and sliding bilayer configurations [64,66,148] can be verified by using ARPES. The aforementioned electronic characteristics have also been confirmed in absorption [164, 166-168, 173, 174, 177], transmission [180,181], refection [136], Raman scattering and Rayleigh scattering spectroscopy [75,76,138,139,171,172,[236][237][238][239][240][241][242][243]. The evidence of Dirac cones has been observed for monolayer graphene in terms of the zero threshold frequency and the linear dependence of the intensity on the frequency.…”

Section: Introductionmentioning

confidence: 75%

“…The electronic properties are studied by use of STM, STS [6-9, 11] and ARPES [10,[68][69][70][71][72][73][74][75][76]. The band structures based on the tight-binding model agree with the first principles calculations [64, 66, 77, 78, 80-84, 89, 90, 93, 94, 96, 148].…”

Section: Introductionmentioning

confidence: 86%

“…Synthesized graphene is generally comprised of different kinds of domain due to the tiny difference between the total energies of the different configurations. Infrared spectroscopy, transmission electron microscopy (TEM) [3][4][5]34], scanning tunneling microscopy (STM) and spectroscopy (STS) [6-9, 11, 35-37], angle-resolved photoemission spectroscopy (ARPES) [68][69][70][71][72][73][74], and Raman spectroscopy [10,75,76], can be used to visualize the stacking domains with nanometric resolution for cases of tri-, tetra-and pentalayer graphene with typical or intermediate configurations.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Introduction

Lin¹,

Do²,

Huang³

et al. 2017

Optical Properties of Graphene in Magnetic and Electric Fields

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Section: Introductionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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Introduction

Lin¹,

Do²,

Huang³

et al. 2017

Optical Properties of Graphene in Magnetic and Electric Fields

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“…Recently, some novel methods are emerged to prepare graphene membranes. For example, Raghavan et al [58] used plasma to prepare graphene membranes on the substrates including 6H-SiC etched by CF 4 -and Cl 4 -based plasmas and the results showed that the etching process could selectively etch silicon to produce carbon-rich surface layers on the silicon carbide substrate. When annealed, these carbon-rich layers formed graphene films with halogen-and oxygen-based defects.…”

Section: Graphene and Go For Gaseous Selectivity Separationmentioning

confidence: 99%

Next-Generation Graphene-Based Membranes for Gas Separation and Water Purifications

Xu¹,

Zhang²

2016

Advances in Carbon Nanostructures

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Advanced membrane systems are regarded as an important portion of controllable separation processes, such as gas separation and water purification. The ideal materials should have good permeability for selected particle sizes, high stiffness to withstand high pressures applied, large surface area and micro-or nanopore structures for excellent selectivity. Recently, graphene with oxygen-containing functional groups and graphene oxide (GO) nanosheets, obtained via chemical oxidation of graphite, achieved tremendous properties that include excellent mechanical strength, large relative surface area, unique honeycomb lattice two-dimensional structure as well as narrow pore distribution, offering platform to be used as advanced, ultrathin membrane for a wide variety of purification process with high efficiency. In this review chapter, the potential application of such advanced materials for gas separation and water purification process is discussed. The fabrication and modification process and innovation of such advanced two-dimensional functional structure for purification and separation process are introduced. This review chapter will offer opportunity to understand details involved in gas and/or water molecular transport through thin, laminar graphene oxide and derived structures, as well as up to now progress in the field.

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“…The synthesized graphene generally comprises different kinds of domains due to the tiny difference among the total energies of different configurations. Infrared spectroscopy, transmission electron microscopy (TEM) [3-5,34], scanning tunneling microscopy (STM) and spectroscopy (STS) [6-9, 11, 35-37], angle resolved photoemission spectroscopy (ARPES) [62][63][64][65][66][67][68], and Raman spectroscopy [10,69,70], are used to visualize stacking domains with a namometric resolution for cases of tri-, tetra-, and pentalayer graphene with typical or intermediate configurations.Monolayer graphene belongs to a gapless system which possesses extremely high carrier mobility of up to 15,000 cm 2 V −1 s −1 [1]. P. R. Wallace has discovered that the low-energy 1 spectrum around the corners K and K in the Brillouin zone is described by isotropically conical dispersions in the framework of the nearest-neighbor tight-binding model [71].…”

mentioning

confidence: 99%

Optical Properties of Graphene in Magnetic and Electric Fields

Lin

Huang

et al. 2017

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Optical properties of graphene are explored by using the generalized tight-binding model. The main features of spectral structures, the form, frequency, number and intensity, are greatly enriched by the complex relationship among the interlayer atomic interactions, the magnetic quantization and the Coulomb potential energy. Absorption spectra have shoulders, asymmetric peaks and logarithmic peaks, coming from the band-edge states of parabolic dispersions, the constant-energy loops and the saddle points, respectively. The initial forbidden excitation region is only revealed in even-layer AA stacking systems. Optical gaps and special structures can be generated by an electric field. The delta-function-like structures in magneto-optical spectra, which present the single, twin and double peaks, are associated with the symmetric, asymmetric and splitting Landau-level energy spectra, respectively. The single peaks due to the non-tilted Dirac cones exhibit the nearly uniform intensity. The AAB stacking possesses more absorption structures, compared to the other stackings. The diverse magneto-optical selection rules are mainly determined by the well-behaved, perturbed and undefined Landau modes. The frequent anti-crossings in the magneticand electric-field-dependent energy spectra lead to the increase of absorption peaks and the reduced intensities. Part of theoretical calculations are consistent with the 1 arXiv:1603.02797v2 [physics.comp-ph] 19 Jul 2016 experimental measurements, and the others need further detailed examinations.Graphene is a 2D material made up of hexagonal carbon lattices [1,2]. Since mono-and few-layer graphene sheets were first fabricated in 2004 [1,2], low-dimensional graphenerelated systems have been a great interest to experimental and theoretical studies. The stacking orders of graphene sheets include the essential sequences of AA [3,4], AB [5-9], ABC [5,[8][9][10][11] stackings. While the AA stacking configuration has only been artificially made from intercalated graphite compounds, the AB and ABC configurations are the common orders in natural graphite, respectively, with their estimated volume fractions: 80 % and 14 % [15,16]. The rest parts ∼ 6% consist of haphazardly stacked graphene sheets, called turbostratic configuration [17][18][19]. Few-layer graphene desired with a specific stacking configuration can be exfoliated from highly orientated pyrolytic graphite [1,2], and chemically and electrochemically reduced from graphene oxide [20][21][22][23][24][25][26][27]. Nevertheless, chemical vapor deposition method has the advantage of producing large-scale size of highquality graphene sheets. Recently, large area of graphene with high mobility and highly symmetric configurations, e.g., AA, AB and ABC, have been found in CVD-grown samples [28][29][30][31][32][33][34][35][36][37][38][39][40]. The improved quality is adequate for research experiments and industry applications [41][42][43][44][45][46][47][48][49][50]. In addition, the AAB stacking and intermediate bilayer configurations, with r...

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Characterization of graphene-on-insulator films formed using plasma based surface chemistry

Cited by 12 publications

References 54 publications

Introduction

Introduction

Next-Generation Graphene-Based Membranes for Gas Separation and Water Purifications

Optical Properties of Graphene in Magnetic and Electric Fields

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